Motor stator, motor and compressor

Abstract

The technical scheme of the utility model discloses a motor stator, a motor and a compressor, the motor stator comprises a stator iron core and a stator winding, the stator iron core comprises a stator yoke and a plurality of stator teeth arranged at the inner side of the stator yoke at intervals, and two adjacent stator teeth form a stator slot. The groove bottom of the stator groove comprises a first groove section and a second groove section in the circumferential direction of the stator core, an included angle is formed between the first groove section and the second groove section, and at least one of the first groove section and the second groove section is linear; the joints of the first slot section and the slot side walls of the adjacent stator slots and the joints of the second slot section and the slot side walls of the adjacent stator slots are chamfered, and the radius of each chamfer is R1; the stator winding wire is wound in the stator groove, the wire diameter of the stator winding wire is RW, and R1 and RW meet the condition that R1 / RW is larger than or equal to 1 and smaller than or equal to 3. According to the technical scheme of the utility model, the matching between the stator winding and the groove type structure of the stator groove can be increased, the regularity of the stator winding is ensured, the winding process is improved, the groove fullness rate of the motor stator is improved, and the motor efficiency is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, and in particular to a motor stator, a motor and a compressor. Background Art

[0002] In the prior art, the motor stator includes a stator core and a winding. The stator core is formed by laminating a plurality of stator punching sheets. For the convenience of manufacturing, segmented enameled copper flat winding wires are inserted axially from the stator core into the stator slots and connected into a complete winding to form an armature coil. Since the selection of the winding wire diameter and the slot shape of the stator slot bottom are not completely matched, the actual winding wire cannot reliably fit the slot bottom of the stator slot, and there is a partial waste of winding space, so that the effective slot area of ​​the winding is reduced and the motor efficiency is reduced. Utility Model Content

[0003] The main purpose of the utility model is to provide a motor stator, aiming to improve the efficiency of the motor.

[0004] The utility model technical solution proposes a motor stator, comprising:

[0005] A stator core, comprising a stator yoke and a plurality of stator teeth spaced apart inside the stator yoke, wherein two adjacent stator teeth form a stator slot, wherein the slot bottom of the stator slot comprises a first slot segment and a second slot segment in the circumferential direction of the stator core, wherein the first slot segment and the second slot segment form an angle, and at least one of the first slot segment and the second slot segment is in a straight line; the first slot segment and the second slot segment are chamfered at their respective connections with the slot side walls of the adjacent stator slots, and the radius of the chamfer is R1;

[0006] The stator winding is wound in the stator slot, and the wire diameter of the stator winding is R W , R1 and R W Satisfy: 1≤R1 / R W ≤3.

[0007] In one embodiment, the first slot segment and the second slot segment are both straight-line-shaped, and the first slot segment and the second slot segment are symmetrically arranged.

[0008] In one embodiment, an included angle formed by the first slot segment and the second slot segment is θ, and 150°≤θ≤175°.

[0009] In one embodiment, the length of the first slot segment or the second slot segment is TH1, and after the maximum number of stator windings are placed along the first slot segment or the second slot segment, the remaining length of the first slot segment or the second slot segment is equal to R W The ratio of KTH1 to R W Satisfies: KTH1=[TH1-Floor(TH1 / RW )*R W ] / R W , KTH1∈(0~0.677).

[0010] In one embodiment, the slot bottom of the stator slot also includes a third slot segment in the circumferential direction of the stator core, the third slot segment is arranged between the first slot segment and the second slot segment, and connects the first slot segment and the second slot segment, and the third slot segment is straight or arc-shaped.

[0011] In one embodiment, the third slot segment is in an arc shape convex toward the center of the stator core.

[0012] In one embodiment, the length of the third slot segment is TH2, and after the maximum number of stator windings are placed along the third slot segment, the remaining length of the third slot segment is equal to R W The ratio of KTH2 to R W Satisfies: KTH2=[TH2-Floor(TH2 / R W )*R W ] / R W , KTH2∈(0~0.677).

[0013] In one embodiment, two side walls of the stator tooth at one end away from the stator yoke are respectively provided with stator pole shoes facing the adjacent stator teeth, and the connection between the inner side wall of the stator pole shoe and the slot side wall of the stator slot is chamfered, and the radius of the chamfer is R2, R2 and R W Satisfy: 0.5≤R2 / R W ≤4.

[0014] In one embodiment, the length of the slot sidewall of the stator slot extending along the radial direction of the stator core is TH3, and after the maximum number of stator windings are placed along the slot sidewall of the stator slot, the remaining length of the slot sidewall of the stator slot is equal to R W The ratio of KTH3 to R W Satisfies: KTH3=[TH3-Floor(TH3 / R W )*R W ] / R W , KTH3∈(0~0.677).

[0015] In one embodiment, the length of the inner side wall of the stator pole shoe is TH4, and after the maximum number of stator windings are placed along the inner side wall of the stator pole shoe, the remaining length of the inner side wall of the stator pole shoe is equal to R W The ratio of KTH4 to R W Satisfies: KTH4=[TH4-Floor(TH4 / R W )*RW ] / R W , KTH4∈(0~0.677).

[0016] In one embodiment, the first slot segment and the second slot segment are respectively connected to the slot side walls of the adjacent stator slots with rounded corners;

[0017] And / or, the connection between the inner side wall of the stator pole shoe and the slot side wall of the stator slot is rounded.

[0018] In one embodiment, R1≤2 mm;

[0019] and / or, R2≤2mm;

[0020] and / or, 0.1mm≤R W ≤2mm.

[0021] The utility model also provides a motor, which comprises the motor stator mentioned above.

[0022] The utility model also provides a compressor, which comprises the above-mentioned motor.

[0023] The technical solution of the utility model is that at least one of the first slot segment and the second slot segment is set to be linear, and the radius R1 of the chamfer at the connection between the first slot segment and the second slot segment and the slot side wall of the adjacent stator slot and the wire diameter R W Satisfy: 1≤R1 / R W ≤3, which can increase the matching of the stator winding and the slot structure of the stator slot, ensure the regularity of the stator winding, and help improve the winding process, increase the slot fill rate of the motor stator, and thus improve the motor efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0025] Figure 1 It is a schematic structural diagram of the motor stator of the original embodiment;

[0026] Figure 2 This is a schematic structural diagram of the motor stator of the first embodiment of the utility model;

[0027] Figure 3 for Figure 2 A partial enlarged view of the middle part;

[0028] Figure 4 This is a schematic structural diagram of a motor stator according to a second embodiment of the present utility model;

[0029] Figure 5 for Figure 4 A partial enlarged view of point B in the middle;

[0030] Figure 6 This is a schematic diagram of the structure of the motor stator of the third embodiment of the utility model;

[0031] Figure 7 for Figure 6 A partial enlarged view of point C in the middle;

[0032] Figure 8 R1 / R W Relationship diagram of the number of turns at the arc base;

[0033] Fig. 9 R2 / R W Relationship diagram of the number of turns at the arc base;

[0034] Fig.10 This is the relationship diagram of KTH versus the number of arc base turns;

[0035] Fig.11 It is a comparison chart of the motor efficiency and slot fill rate of the three embodiments of the present utility model and the original example.

[0036] Description of Figure Numbers:

[0037]

[0038] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0041] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if the meaning of "and / or" appearing in the full text is to include three parallel schemes, taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0042] Please refer to Figure 2 and Figure 3 The utility model provides a motor stator 10, including a stator core 100 and a stator winding 200. The stator core 100 includes a stator yoke 110 and a plurality of stator teeth 120 arranged at intervals on the inner side of the stator yoke 110. Two adjacent stator teeth 120 form a stator slot 130. The slot bottom of the stator slot 130 includes a first slot segment 131 and a second slot segment 132 in the circumferential direction of the stator core 100. The first slot segment 131 and the second slot segment 132 form an angle. At least one of the first slot segment 131 and the second slot segment 132 is linear. The first slot segment 131 and the second slot segment 132 are chamfered at the connection points with the slot side walls of the adjacent stator slots 130, and the radius of the chamfer is R1. The stator winding 200 is wound in the stator slot 130, and the wire diameter of the stator winding 200 is R W , R1 and R W Satisfy: 1≤R1 / R W ≤3.

[0043] Specifically, the motor stator 10 includes a stator core 100 and a stator winding 200. The stator core 100 is formed by laminating silicon steel plates. The stator core 100 includes a stator yoke 110 and stator teeth 120. The stator yoke 110 is annular, and a plurality of stator teeth 120 are arranged on the inner side of the stator yoke 110 at intervals along the circumference of the stator yoke 110. Stator slots 130 are defined between adjacent stator teeth 120. The number of stator slots 130 is the same as the number of stator teeth 120. The stator winding 200 passes through the stator slots 130 and is directly wound on the stator teeth 120.

[0044] The slot bottom of the stator slot 130 includes a first slot segment 131 and a second slot segment 132 in the circumferential direction of the stator core 100. The first slot segment 131 and the second slot segment 132 can be directly connected to each other and form an angle; the first slot segment 131 and the second slot segment 132 can also be indirectly connected through other slot segments, and their extended lines intersect and form an angle. The first slot segment 131 and the second slot segment 132 can be one of a straight line and the other of an arc or other shape. For example, the first slot segment 131 of a stator slot 130 is straight line, and the second slot segment 132 is arc; the second slot segment 132 of another stator slot 130 adjacent to the first slot segment 131 is straight line, and the first slot segment 131 of another stator slot 130 adjacent to the second slot segment 132 is arc. The first slot segment 131 and the second slot segment 132 can also both be straight lines. By optimizing the design of the first slot segment 131 and the second slot segment 132, the stator winding 200 is more closely matched with the slot structure of the bottom of the stator slot 130, so that the stator winding 200 is arranged more compactly in the stator slot 130, and the loss and resistance of the winding can be reduced while the slot fill rate is improved, thereby achieving more effective electromagnetic energy conversion, improving the power density and working efficiency of the motor, and further improving the performance of the motor in various application scenarios.

[0045] The connection between the first slot segment 131 and the second slot segment 132 and the slot side wall of the adjacent stator slot 130 is chamfered, which can be a right angle or a rounded angle, and the radius of the chamfer is R1. W , when R1 / R W When R1 / R W When the angle is greater than 3, the chamfer is too large, which reduces the space of the stator slot 130, making it difficult to place more stator windings 200 and also reducing the motor efficiency.

[0046] Combination Figure 8 It can be seen that when R1 and R W Satisfy: 1≤R1 / R W When ≤3, while ensuring that the space of the stator slot 130 is larger, the stator winding 200 can better match and fit the slot wall of the stator slot 130 at the chamfer, and the regularity of the arrangement of the stator winding 200 is improved, the equivalent stator winding 200 is improved, and the number is increased by 1~2 turns, thereby further improving the slot fill rate of the motor stator 10, and then improving the motor efficiency.

[0047] The technical solution of the utility model is that at least one of the first slot segment 131 and the second slot segment 132 is set to be linear, and the radius R1 of the chamfer at the connection between the first slot segment 131 and the second slot segment 132 and the adjacent slot side wall of the stator slot 130 and the wire diameter R W Satisfy: 1≤R1 / R W ≤3, which can increase the matching of the slot structure between the stator winding 200 and the stator slot 130, ensure the regularity of the stator winding 200, and help improve the winding process, increase the slot fill rate of the motor stator 10, and thus improve the motor efficiency.

[0048] In one embodiment, the first slot segment 131 and the second slot segment 132 are both straight-line-shaped, and the first slot segment 131 and the second slot segment 132 are symmetrically arranged.

[0049] Please refer to Figure 3 The first slot segment 131 and the second slot segment 132 are both linear, which further improves the matching degree between the stator winding 200 and the entire stator slot 130, making the stator winding 200 more regular, better improving the slot fill rate, and more effectively improving the efficiency of the motor. In addition, the first slot segment 131 and the second slot segment 132 are symmetrically arranged, making the structure of the stator slot 130 more uniform and symmetrical, and making the shape of the stator slot 130 more regular, which is conducive to the arrangement and insulation of the winding, reducing electromagnetic losses, and improving the performance and efficiency of the motor. At the same time, this symmetrical arrangement also helps to reduce the difficulty of processing the stator slot 130 and improve production efficiency.

[0050] In one embodiment, the included angle formed by the first slot segment 131 and the second slot segment 132 is θ, and 150°≤θ≤175°.

[0051] Please refer to Figure 3 When θ<150°, or θ≥180°, the space of the stator slot 130 is reduced, which is not conducive to arranging more stator windings 200, and the slot filling rate of the motor stator 10 is reduced, thereby reducing the motor efficiency. When 175°<θ<180°, the matching degree between the stator winding 200 and the slot structure of the bottom of the stator slot 130 is low, so that the arrangement of the stator winding 200 in the stator slot 130 is not compact enough, and the slot filling rate of the motor stator 10 is reduced, thereby reducing the motor efficiency. When 150°≤θ≤175°, while ensuring that the space of the stator slot 130 is large, the matching degree between the stator winding 200 and the slot structure of the bottom of the stator slot 130 is higher, which can improve the regularity of the stator winding 200 arrangement, thereby further improving the slot filling rate of the motor stator 10, and then improving the motor efficiency.

[0052] In one embodiment, the length of the first slot segment 131 or the second slot segment 132 is TH1, and after the maximum number of stator windings 200 are placed along the first slot segment 131 or the second slot segment 132, the remaining length of the first slot segment 131 or the second slot segment 132 is equal to R W The ratio of KTH1 to R W Satisfies: KTH1=[TH1-Floor(TH1 / R W )*R W ] / R W , KTH1∈(0~0.677).

[0053] Please refer to Figure 3 and Fig.10 , when the first slot segment 131 or the second slot segment 132 is straight, its length is TH1; when one of the first slot segment 131 or the second slot segment 132 is arc-shaped, the straight-line distance between its two ends is its length TH1. KTH1 represents the remaining length of the first slot segment 131 or the second slot segment 132 after the maximum number of stator windings 200 are placed along the first slot segment 131 or the second slot segment 132 and R W When the ratio KTH1∈(0-0.677), the number of turns of the stator winding 200 can be increased in coordination with the chamfer, that is, the number of turns of the stator winding 200 along the first slot section 131 or the second slot section 132 in coordination with the chamfer can be increased by 1 turn. Wherein Floor represents a floor rounding function.

[0054] In one embodiment, the slot bottom of the stator slot 130 also includes a third slot segment 133 in the circumferential direction of the stator core 100. The third slot segment 133 is arranged between the first slot segment 131 and the second slot segment 132, and connects the first slot segment 131 and the second slot segment 132. The third slot segment 133 is straight or arc-shaped.

[0055] Please refer to Figures 2 to 7 The third slot section 133 is provided between the first slot section 131 and the second slot section 132, and connects the first slot section 131 and the second slot section 132. The area of ​​the third slot section 133 extending along the radial direction of the stator core 100 toward the center of the stator core 100 can be used as a buffer area for the area of ​​the first slot section 131 and the second slot section 132 extending along the radial direction of the stator core 100 toward the center of the stator core 100. The stator winding 200 may be placed in the area of ​​the third slot section 133 extending along the radial direction of the stator core 100 toward the center of the stator core 100, or the stator winding 200 may not be placed. The third slot section 133 may be linear or arc-shaped. When the third slot section 133 may be arc-shaped, it may be an arc convex toward the center of the stator core 100, or it may be an arc concave away from the center of the stator core 100.

[0056] By adding a third slot segment 133 between the first slot segment 131 and the second slot segment 132 and optimizing the shape of the third slot segment 133, the structure of the stator slot 130 becomes more complex and diverse, the space of the stator core 100 can be better utilized, and the matching degree between the stator winding 200 and the stator slot 130 can be improved, which is conducive to further optimizing the arrangement of the stator winding 200, further improving the winding process, and improving the flexibility and efficiency of the winding process, thereby further improving the performance and efficiency of the motor.

[0057] In one embodiment, the third slot segment 133 is in an arc shape convex toward the center of the stator core 100 .

[0058] Please refer to Figure 7 The shape of the third slot segment 133 protruding toward the center of the stator core 100 limits the stator winding 200 of the first slot segment 131 and the second slot segment 132, thereby ensuring that the number of turns of the stator winding 200 is increased while ensuring the reliability of insulation between the stator winding 200 of the first slot segment 131 and the second slot segment 132.

[0059] In one embodiment, the length of the third slot segment 133 is TH2. After the stator winding 200 is placed along the third slot segment 133 in maximum quantity, the remaining length of the third slot segment 133 is equal to R W The ratio of KTH2 to R W Satisfies: KTH2=[TH2-Floor(TH2 / R W )*R W ] / R W , KTH2∈(0~0.677).

[0060] Please refer to Figure 3 and Fig.10 When the third slot segment 133 is in a straight line, its length is TH2; when the third slot segment 133 is in an arc shape, the straight line distance between its two ends is its length TH2. KTH2 represents the remaining length of the third slot segment 133 after the maximum number of stator windings 200 are placed along the third slot segment 133 and R W When the ratio KTH2∈(0-0.677), the number of turns of the stator winding 200 along the third slot segment 133 can be increased by 1 turn. Wherein Floor represents a floor rounding function.

[0061] In one embodiment, two side walls of the stator tooth 120 away from the stator yoke 110 are respectively provided with stator pole shoes 140 facing the adjacent stator teeth 120, and the connection between the inner side wall of the stator pole shoe 140 and the slot side wall of the stator slot 130 is chamfered, and the radius of the chamfer is R2, R2 and R W Satisfy: 0.5≤R2 / R W ≤4.

[0062] Please refer to Figure 3 , the inner side wall of the stator pole shoe 140 forms an angle with the slot side wall of the stator slot 130, and the angle is an obtuse angle. While increasing the internal space of the stator slot 130, it is also convenient for the stator winding 200 to match and fit the slot wall of the stator slot 130. The connection between the inner side wall of the stator pole shoe 140 and the slot side wall of the stator slot 130 is chamfered, which can be a chamfered right angle or a rounded angle, and the radius of the chamfer is R2. The wire diameter of the stator winding 200 is R W , when R2 / R W <0.5 and R1 / R W When >4, the chamfers at the connection between the inner wall of the stator pole shoe 140 and the side wall of the stator slot 130 are correspondingly too small and too large, resulting in the inability of the stator winding 200 to fit reliably, so that there is partial waste of space at the connection between the inner wall of the stator pole shoe 140 and the side wall of the stator slot 130, the effective slot area of ​​the winding will be reduced, and the motor efficiency will be reduced.

[0063] Combination Fig. 9 It can be seen that when R2 and R W Satisfy: 0.5≤R2 / R W ≤4, while ensuring that the space of the stator slot 130 is larger, the stator winding 200 can be more matched and fitted at the connection between the inner wall of the stator pole shoe 140 and the slot side wall of the stator slot 130, and the regularity of the arrangement of the stator winding 200 is improved, and the equivalent stator winding 200 is improved, and the number is increased by 1~2 turns, thereby further improving the slot fill rate of the motor stator 10, and then improving the motor efficiency.

[0064] In one embodiment, the length of the slot sidewall of the stator slot 130 extending in the radial direction of the stator core 100 is TH3. After the maximum number of stator windings 200 are placed along the slot sidewall of the stator slot 130, the remaining length of the slot sidewall of the stator slot 130 is equal to R W The ratio of KTH3 to R W Satisfies: KTH3=[TH3-Floor(TH3 / R W )*R W ] / R W , KTH3∈(0~0.677).

[0065] Please refer to Figure 3 and Fig.10 , the length of the slot sidewall of the stator slot 130 extending in the radial direction of the stator core 100 is TH3, KTH3 represents the remaining length of the slot sidewall of the stator slot 130 after the maximum number of stator windings 200 are placed along the slot sidewall of the stator slot 130 and R WWhen the ratio KTH3∈(0-0.677), the number of turns of the stator winding 200 can be increased by coordinating the chamfer at the connection between the inner side wall of the stator pole shoe 140 and the slot side wall of the stator slot 130, that is, the number of turns of the stator winding 200 along the slot side wall of the stator slot 130 can be increased by coordinating the chamfer, and the increase is 1 turn. Wherein Floor represents a rounding down function.

[0066] In one embodiment, the length of the inner side wall of the stator pole shoe 140 is TH4. After the maximum number of stator windings 200 are placed along the inner side wall of the stator pole shoe 140, the remaining length of the inner side wall of the stator pole shoe 140 is equal to R. W The ratio of KTH4 to R W Satisfies: KTH4=[TH4-Floor(TH4 / R W )*R W ] / R W , KTH4∈(0~0.677).

[0067] Please refer to Figure 3 and Fig.10 , the length of the inner side wall of the stator pole shoe 140 is TH4, KTH4 represents the remaining length of the inner side wall of the stator pole shoe 140 after the maximum number of stator windings 200 are placed along the inner side wall of the stator pole shoe 140 and R W When the ratio KTH4∈(0~0.677), the number of turns of the stator winding 200 can be increased by coordinating the chamfer at the connection between the inner side wall of the stator pole shoe 140 and the slot side wall of the stator slot 130, that is, the number of turns of the stator winding 200 along the inner side wall of the stator pole shoe 140 can be increased by coordinating the chamfer, and the increase is 1 turn. Wherein Floor represents a floor rounding function.

[0068] In one embodiment, the connection between the first slot segment 131 and the second slot segment 132 and the slot side walls of the adjacent stator slot 130 is chamfered; and / or the connection between the inner side wall of the stator pole shoe 140 and the slot side wall of the stator slot 130 is chamfered.

[0069] Please refer to Figure 3 The first slot segment 131 and the second slot segment 132 are respectively connected to the slot sidewalls of the adjacent stator slots 130 with rounded corners, so that the stator winding 200 and the slot bottom of the stator slot 130 have a better fit effect, which is more conducive to the compact arrangement of the stator winding 200 here. The connection between the inner sidewall of the stator pole shoe 140 and the slot sidewall of the stator slot 130 is rounded, so that the stator winding 200 and the inner sidewall of the stator pole shoe 140 and the slot sidewall of the stator slot 130 have a better fit effect, which is more conducive to the compact arrangement of the stator winding 200 here. At the same time, the setting of the rounded corners can also ensure the feasibility of the process manufacturing of the stator core 100.

[0070] In one embodiment, R1≤2mm; and / or, R2≤2mm; and / or, 0.1mm≤R W ≤2mm.

[0071] The wire diameter of the stator winding 200 is R W , 0.1mm≤R W ≤2mm, the stator winding 200 is not easily torn during winding, and the winding speed can be guaranteed; it can ensure sufficient current conduction capacity and ensure that the resistance is not too high. The radius of the chamfer at the connection between the first slot segment 131 and the second slot segment 132 and the slot side wall of the adjacent stator slot 130 is R1, 0.1mm≤R1≤2mm. The radius of the chamfer at the connection between the inner side wall of the stator pole shoe 140 and the slot side wall of the stator slot 130 is R2, 0.05mm≤R1≤2mm.

[0072] Please refer to Figure 1 In an original example, the bottom of the stator slot 130 is a continuous arc in the circumferential direction of the stator core 100, and the ratio of the chamfer radius of the connection between the bottom of the stator slot 130 and the slot side wall of the stator slot 130 to the wire diameter of the stator winding 200 is K1 [1~3].

[0073] Please refer to Figure 2 and Figure 3 In the first embodiment, the bottom of the stator slot 130 includes a first slot section 131, a second slot section 132 and a third slot section 133, and the first slot section 131, the second slot section 132 and the third slot section 133 are all wound with stator windings 200, the third slot section 133 is linear, or is an arc-shaped arc that is concave away from the center of the stator core 100, the chamfer of the connection between the first slot section 131 and the second slot section 132 and the slot side wall of the stator slot 130 adjacent to them is R1, the chamfer of the connection between the inner side wall of the stator pole shoe 140 and the slot side wall of the stator slot 130 is R2, and the wire diameter of the stator winding 200 is R W , satisfying 1≤R1 / R W ≤3, and 0.5≤R2 / R W ≤4, satisfying KTH1, KTH2, KTH3, KTH4∈ (0~0.677), the number of turns of stator winding 200 is increased.

[0074] Please refer to Figure 4 and Figure 5In the second embodiment, the slot bottom of the stator slot 130 includes a first slot section 131, a second slot section 132 and a third slot section 133. The first slot section 131 and the second slot section 132 are both wound with stator windings 200. The third slot section 133 is linear or arc-shaped and concave away from the center of the stator core 100. The third slot section 133 does not place the stator winding 200. The chamfer of the connection between the first slot section 131 and the second slot section 132 and the slot side wall of the stator slot 130 adjacent to them is R1. The chamfer of the connection between the inner side wall of the stator pole shoe 140 and the slot side wall of the stator slot 130 is R2. The wire diameter of the stator winding 200 is R W , satisfying 1≤R1 / R W ≤3, and 0.5≤R2 / R W ≤4, satisfying KTH1, KTH2, KTH3, KTH4∈ (0~0.677), the number of turns of stator winding 200 is increased.

[0075] Please refer to Figure 6 and Figure 7 In the third embodiment, the bottom of the stator slot 130 includes a first slot section 131, a second slot section 132 and a third slot section 133. The first slot section 131 and the second slot section 132 are both wound with stator windings 200. The third slot section 133 is in an arc shape convex toward the center of the stator core 100. The third slot section 133 does not place the stator windings 200. The chamfers of the connections between the first slot section 131 and the second slot section 132 and the slot side walls of the stator slot 130 adjacent thereto are R1, the chamfers of the connections between the inner side walls of the stator pole shoe 140 and the slot side walls of the stator slot 130 are R2, and the wire diameter of the stator windings 200 is R W (The wire diameter of the stator winding 200 of the second embodiment is larger than that of the stator winding 200 of the first embodiment and the third embodiment), satisfying 1≤R1 / R W ≤3, and 0.5≤R2 / R W ≤4, satisfying KTH1, KTH2, KTH3, KTH4∈ (0~0.677), the number of turns of stator winding 200 is increased.

[0076] Please refer to Fig.11 Compared with the original example, the slot fill rate of the first embodiment, the second embodiment and the third embodiment increases by more than 2%, and the motor efficiency increases by more than 0.28%.

[0077] The utility model also proposes a motor, which includes a motor stator 10. The specific structure of the motor stator 10 refers to the above embodiment. Since the motor adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0078] The utility model also proposes a compressor, which includes a motor. The specific structure of the motor refers to the above embodiment. Since the compressor adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0079] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A motor stator, characterized in that: include: A stator core, comprising a stator yoke and a plurality of stator teeth spaced apart on the inner side of the stator yoke, wherein two adjacent stator teeth form a stator slot, wherein the slot bottom of the stator slot comprises a first slot segment and a second slot segment in the circumferential direction of the stator core, wherein the first slot segment and the second slot segment form an angle, and at least one of the first slot segment and the second slot segment is in a straight line shape; the first slot segment and the second slot segment are chamfered at their respective connections with the slot side walls of the adjacent stator slots, and the radius of the chamfer is R1; The stator winding is wound in the stator slot, and the wire diameter of the stator winding is R W , R1 and R W Satisfy: 1≤R1 / R W ≤3.

2. The motor stator according to claim 1, characterized in that: The first slot section and the second slot section are both straight-line-shaped, and the first slot section and the second slot section are symmetrically arranged.

3. The motor stator according to claim 2, characterized in that: An included angle formed by the first slot segment and the second slot segment is θ, 150°≤θ≤175°.

4. The motor stator according to claim 2, characterized in that: The length of the first slot segment or the second slot segment is TH1, and after the maximum number of stator windings are placed along the first slot segment or the second slot segment, the remaining length of the first slot segment or the second slot segment is equal to R W The ratio of KTH1 to R W Satisfies: KTH1=[TH1-Floor(TH1 / R W )*R W ] / R W , KTH1∈(0~0.677).

5. The motor stator according to claim 2, characterized in that: The slot bottom of the stator slot also includes a third slot segment in the circumferential direction of the stator core. The third slot segment is arranged between the first slot segment and the second slot segment and connects the first slot segment and the second slot segment. The third slot segment is straight or arc-shaped.

6. The motor stator according to claim 5, characterized in that: The third slot segment is in an arc shape convex toward the center of the stator core.

7. The motor stator according to claim 5, characterized in that: The length of the third slot segment is TH2. After the maximum number of stator windings are placed along the third slot segment, the remaining length of the third slot segment is equal to R W The ratio of KTH2 to R W Satisfies: KTH2 = [TH2-Floor(TH2 / R W )*R W ] / R W , KTH2∈(0~0.677).

8. The motor stator according to any one of claims 1 to 7, characterized in that: The two side walls of the stator tooth at one end away from the stator yoke are respectively provided with stator pole shoes facing the adjacent stator teeth, and the connection between the inner side wall of the stator pole shoe and the slot side wall of the stator slot is chamfered, and the radius of the chamfer is R2, R2 and R W Satisfy: 0.5≤R2 / R W ≤4.

9. The motor stator according to claim 8, characterized in that: The length of the slot sidewall of the stator slot extending in the radial direction of the stator core is TH3. After the maximum number of stator windings are placed along the slot sidewall of the stator slot, the remaining length of the slot sidewall of the stator slot is equal to R W The ratio of KTH3 to R W Satisfies: KTH3=[TH3-Floor(TH3 / R W )*R W ] / R W , KTH3∈(0~0.677).

10. The motor stator according to claim 8, characterized in that: The length of the inner side wall of the stator pole shoe is TH4. After the maximum number of stator windings are placed along the inner side wall of the stator pole shoe, the remaining length of the inner side wall of the stator pole shoe is equal to R W The ratio of KTH4 to R W Satisfies: KTH4 = [TH4-Floor(TH4 / R W )*R W ] / R W , KTH4∈(0~0.677).

11. The motor stator according to claim 8, characterized in that: The first slot segment and the second slot segment are respectively connected to the slot side walls of the adjacent stator slots with rounded corners; And / or, the connection between the inner side wall of the stator pole shoe and the slot side wall of the stator slot is rounded.

12. The motor stator according to claim 8, characterized in that: R1≤2mm; and / or, R2≤2mm; and / or, 0.1mm≤R W ≤2mm.

13. A motor, characterized in that: The invention comprises a motor stator as claimed in any one of claims 1 to 12.

14. A compressor, characterized in that: Comprising the motor as claimed in claim 13.

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